$\left(2x+3y\:-4\right)\:-\:\left(5x+2\:\right)$

$2x-6=10$

$\left(6y^3-3\right)^2$

$\frac{13\:\cos\left(x\right)}{\:\:\:\:\:\sin\left(x\right)}$

$\lim_{x\to\infty}\left(x\cdot\ln\left(x-4\right)-\ln\left(x+2\right)\right)$

$\int\frac{1}{\sqrt{7-y^2}}dy$

$2ndy-2ydx=0$